Why is coal considered a nonrenewable resource? check all that apply.
1.coal is burned to generate electricity.
2.coal power plants give off large quantities of smoke and ash.
3.coal forms so slowly that we could use up the supply that exists now.
4.coal is available in limited amounts.

t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanatio

you cant move and you feel like someones pushing you down onto your bed it can feel like you want to get up but you just can't it can be extremely scary